The line arresters can only protect the line insulators on the tower equipped with the line arresters from lightning flash and they have no extended protective range.

线路避雷器仅能保护安装了线路避雷器的杆塔自身的线路绝缘子（串）不发生雷击闪络，无外延的雷击保护范围。

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One-Way Pressure Regulating Tower is effective to protect water hammer which is caused by discontinuous water column invited by vacuum inside the pipeline.

单向调压塔是一种用于防止管道系统中产生负压，导致水柱分离再弥合的水锤防护措施。

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Chicago Mayor Richard Daley had requested that the federal government institute a no-fly zone of at least five miles to protect the Sears Tower, the nation's tallest building.

CNN: Chicago gets no-fly zone to protect Sears Tower

Each group can be identified by its costume, particularly the colour of the shirts, while the cummerbund serves to protect the back and is gripped by castellers as they climb up the tower.

UNESCO: Culture